If you have the Owner or Manager user role in Swivel, you are able to view if a user has a linked calendar account (i.e Google or Microsoft).
Navigate to Settings from the left side navigation.
Select Users under Account Settings.
Select the user you wish to view.
Under the Calendar and Email Access section, you can view their linked address of the account as well.
Select Manage to view who this user has delegated Calendar and Email access to within Swivel. As an Owner or Manager, you have the ability to make changes to their delegated access here.